From: Sebastian Ott Date: Mon, 20 Jan 2014 15:43:33 +0000 (+0100) Subject: s390/xpram: don't modify module parameters X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=7e2e2b96f50d17f301f1ee5505bf949c1d90204e;p=deliverable%2Flinux.git s390/xpram: don't modify module parameters During parsing of the sizes array the pointer to the particular string is lost. Keep it by using an extra pointer to store the end position of the parsed string. Keeping these parameters accessible can be helpful for debugging purposes and for userspace reading the parameters at runtime via sysfs. Also this will ensure that the memory is freed at module unload time. Reported-by: Michael Veigel Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c index 464dd29d06c0..58141f0651f2 100644 --- a/drivers/s390/block/xpram.c +++ b/drivers/s390/block/xpram.c @@ -257,6 +257,7 @@ static int __init xpram_setup_sizes(unsigned long pages) unsigned long mem_needed; unsigned long mem_auto; unsigned long long size; + char *sizes_end; int mem_auto_no; int i; @@ -275,8 +276,8 @@ static int __init xpram_setup_sizes(unsigned long pages) mem_auto_no = 0; for (i = 0; i < xpram_devs; i++) { if (sizes[i]) { - size = simple_strtoull(sizes[i], &sizes[i], 0); - switch (sizes[i][0]) { + size = simple_strtoull(sizes[i], &sizes_end, 0); + switch (*sizes_end) { case 'g': case 'G': size <<= 20;